65411531 has 2 divisors, whose sum is σ = 65411532. Its totient is φ = 65411530.

The previous prime is 65411503. The next prime is 65411537. The reversal of 65411531 is 13511456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65411531 - 2¹⁰ = 65410507 is a prime.

It is a super-2 number, since 2×65411531² = 8557336775527922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65411531.

It is not a weakly prime, because it can be changed into another prime (65411537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32705765 + 32705766.

It is an arithmetic number, because the mean of its divisors is an integer number (32705766).

Almost surely, 2^65411531 is an apocalyptic number.

65411531 is a deficient number, since it is larger than the sum of its proper divisors (1).

65411531 is an equidigital number, since it uses as much as digits as its factorization.

65411531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 65411531 is about 8087.7395482298. The cubic root of 65411531 is about 402.9193315089.

Adding to 65411531 its reverse (13511456), we get a palindrome (78922987).

The spelling of 65411531 in words is "sixty-five million, four hundred eleven thousand, five hundred thirty-one".